Proclus: On the Sphere; Cleomedes: On the World; Aratus: Phenomena

The one following him most closely, CLEOMEDES, having premised a discussion on the nature and limit of the whole, adds various demonstrations concerning the parts of the world—such as the heaven, earth, Sun, Moon, and other wandering stars, and their manifold motion—assisted by the aforementioned section. By these, he does not so much corroborate his own opinion on all these things, as he refutes at length the erroneous views of others. ARATUS, who follows him afterwards, paints the upper vault of this structure, as I said; that is, he shows the heaven depicted on every side with the various images of the constellations: teaching which stars are to be placed in any part of the firmament, and what storms some of them portend by their rising or setting; occasionally inserting not...